1. ASPERA Technology Forum 20/10/2011K
Damien DEUBEL KERDRY
ASPERA Technology Forum 20/10/2011 1

2. KERDRY PRESENTATION Y K General presentation Dielectric coatings
Metallic coatings
Focus on 3 products
Mirror for Gamma Astronomy

3. KERDRY : General presentation

4. Y K Y K Y K Y K Y K Machines of coating: 12 Clean room: 850 m ²
KERDRY : General presentation Y K
Machines of coating: 12
Clean room: 850 m ²
France, Lannion. Y K Y K Y K Y K

5. Y K Realization of vacuum thin films : - Dielectric - Metallic
KERDRY : General presentation Y K
Realization of vacuum thin films : - Dielectric - Metallic
Manufacturing technology : - Electron beam
Sputtering

6. Photolithography: a patterning solution
KERDRY : General presentation
KERDRY : General presentation
KERDRY : General presentation
KERDRY : General presentation
KERDRY : General presentation Y K Y K Y K Y K Y K Y K Y K
Photolithography: a patterning solution
Localized deposit with :
Process Lift off
Classical process: chemical etching
Resolution: few micrometers (10 µm)

7. KERDRY : General presentation
Expertise of the association of dielectric and metallic layers on the same substrate.
Substrate until 1.5 m

8. Y K
Dielectric coatings

9. Y K The realized functions. Mirror Antireflective Dichroïc
Dielectric Coatings Y K
The realized functions.
Mirror
Antireflective
Dichroïc
Customer specific filters
Colored coatings…
Wavelength range : 0.35 µm to 15 µm

10. Dielectric Coatings Y K
Treatments on several optical elements: windows, optical fibers, prisms, lenses …
Treatments on several materials: glass, sapphire, plastic, crystals …

11. Y K
Metallic coatings

12. Y K The realized functions. Mirror Electric contact
Metallic Coatings Y K
The realized functions.
Mirror
Electric contact
Metallization for soldering
Air tightness of packaging
Gilding, chromium-plating, aluminizing…
Materials : Ag, Al, Au, Cr, Cu, Ni, Ti…

13. Focus on 3 products : Black Coating ITO SolderingY K
Focus on 3 products : Black Coating ITO Soldering

14. Black Coating Y K A low transmittance ( T< 0.01% )
Focus on 3 products Y K
Black Coating
A low transmittance ( T< 0.01% )
A low reflectance.
The spectral range depends of your specification between 300 nm and 2500 nm
Applications
To define clear apertures.
Reducing light scattering.
Luxury.

15. Indium Tin Oxyde coating ITO
Focus on 3 products Y K
Indium Tin Oxyde coating ITO
Transmission in visible range T > 85%
Resistivity R□ < 20 ohms

16. Metallization for the soldering
Focus on 3 products Y K
Metallization for the soldering
(Cr- Au/ Cr-Ni-Au)
On circumference of optical fiber
Plating on wafer
Plating on glass windows, sapphire…

17. Mirror for Gamma AstronomyK
Mirror for Gamma Astronomy

18. Y K Y K Front face metallic coating
Mirror for Gamma Astronomy Y K Y K
Front face metallic coating
Alumina mirror with protective layers :
SiO2 (R>90%)
Multilayers based on SiO2 and HfO2 (R>95%)
Capacity : 1.4 m diameter

19. Substrates Y K Classical polished glass substrate
Mirror for Gamma Astronomy Y K
Substrates
Classical polished glass substrate
Innovative substrate based on sandwich structure
Issu on a technological transfert between CEA/Irfu and Kerdry

20. Innovative substrate : a sandwich structure
Mirror for Gamma Astronomy Y K
Innovative substrate : a sandwich structure
The spherical shape of the front surface is created by
cold-slumping the front sheet on a high precision mould.
We can do hexagonal mirror of 1.2 m flat-to-flat with m focal length (the planned size for the medium size telescopes of CTA)

21. Y K KERDRY Dielectric Metallisation KERDRY Sandwich structure
Photolithography
Metallisation
Sandwich structure

22. Thanks for your attention